Electronics Expo offers the MartinLogan Dynamo 300 8" 150-watt Powered Subwoofer
, model no. DYNAMO300, for $180.38. Coupon code "SOSORRY" cuts it to $115
. With $19.99
for shipping, that's the lowest total price we could find by $160, although it was $35 less in August. It features 75 watts RMS (150 watts peak), 32Hz to 150Hz frequency response, and Low Frequency Effect (LFE) inputs.